Rise of the genetically-mutated SUPER RATS: Giant rodents that are immune to poison are spreading at 'rapid speeds'

Humans have been using the same rat poisons since the 1950s
But rats have developed a mutation that allows them to survive poisons
Out of 17 UK counties tested, every single one of them had resistant rats
Reports this year suggest that rats in the UK are also becoming bigger
'Super rats' are expected to outnumber humans two to one by next year
Footage of the rats will be shown on the Tonight programme, on ITV at 7.30pm BST

Published: 17:57, 25 June 2014